Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
duong sinh » duong minh, duong manh, trong sinh
dien lang » den lang, dien nang, tien lang
sinh toan » tinh toan, hinh toan, minh toan
mai dien » mach dien, mai viet, hai diem
toan cau » toan cao, toan ban, toan tap
va hang » van hang, va nang, va hanh
va lang » va nang, hoa lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: mai dien lang - hanh trinh ((va hang) or (va lang)) duong sinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mai dien lang - hanh trinh ((va hang) OR (va lang)) duong sinh toan cau.
• Adding a wildcard symbol may retrieve word variants: mai dien lang - hanh trinh ((va hang) or (va lang)) duong sinh toan cau*.